CN210891686U

CN210891686U - Supercritical water thermal combustion device for harmless treatment of high-salt-content organic waste

Info

Publication number: CN210891686U
Application number: CN201921777194.0U
Authority: CN
Inventors: 王树众; 蒋卓航; 李艳辉; 崔成超; 徐海涛; 任萌萌
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-06-30
Anticipated expiration: 2029-10-22

Abstract

The utility model provides a supercritical water heat combustion device for high contain salt organic waste innocent treatment, its end cover sets up in components of a whole that can function independently pressure-bearing wall upper end, and end cover bottom center department is provided with coaxial nozzle base station, and ingenious cooperation constitutes a plurality of reactant annular spaces between end cover and nozzle base station. The inside high temperature combustion chamber that is provided with of burner, the oxygen and the auxiliary fuel that preheat take place the burning in the high temperature combustion chamber, and then ignite organic waste inside burner, realize the rapid heating up burning degradation of low temperature organic waste to effectively reduce the heat consumption of preheating the in-process and prevent the emergence of this in-process corruption and salt deposit. The combustion device is provided with a secondary oxygen and an auxiliary fuel injection port to strengthen the reaction process. The device can realize on-line separation of the reaction effluent and inorganic salt. In addition, the evaporation wall water is preheated through high-temperature outlet water, so that the energy consumption of the system is effectively reduced, and the influence of too low temperature of the evaporation wall water on the effective degradation of pollutants in the combustion device is prevented.

Description

Supercritical water thermal combustion device for harmless treatment of high-salt-content organic waste

Technical Field

The invention belongs to the technical field of environmental protection and chemical industry, relates to a process for carrying out innocent treatment on high-concentration salt-containing organic pollutants which are difficult to biochemically degrade by using supercritical water as a reaction medium, and particularly relates to a supercritical water heat combustion device for innocent treatment of high-salt-containing organic wastes.

Background

Supercritical water is water in a special state at a temperature and pressure exceeding its critical point (374.15 ℃, 22.1 MPa). The density of the gas is close to that of the liquid and is 100-1000 times larger than that of the corresponding normal-pressure gas; the viscosity is close to that of gas and is about 1 to 10 percent of that of corresponding liquid; the diffusion coefficient is between that of gas and liquid and is 10-100 times that of common liquid. Supercritical water has a low dielectric constant, so that the supercritical water becomes a good solvent, can be mutually dissolved with organic matters and oxygen in any proportion to form a uniform phase, and the dissociation constant and the solubility of inorganic salts in the supercritical water are low. Meanwhile, the reaction carried out in a supercritical water environment has higher reaction speed and good heat transfer characteristic due to lower viscosity and higher diffusion coefficient.

Based on the characteristics, in the last 80 th century, scholars model of the United states proposed supercritical water oxidation technology. Supercritical Water Oxidation (SCWO) refers to a rapid homogeneous Oxidation reaction between organic matter and oxidant (generally excess oxidant) in SCW, and the organic matter is thoroughly decomposed into H₂O and CO₂The process of (1). The supercritical water oxidation technology has wide application range, can treat various industrial organic wastewater and wastes, municipal sewage, excessive activated sludge of sewage treatment plants and human metabolic sewage, eliminates toxicants of chemical weapons and the like, and has good environmental protection benefit, social benefit and economic benefit. However, in the conventional supercritical water oxidation process, the organic materials are heated to the supercritical temperature in the preheating system, but the subcritical-to-supercritical state transition process in the heating process is slow, so that the problems of salt precipitation, blockage and corrosion in the preheating system are caused.

The supercritical hydrothermal combustion technology means that when the concentration of organic matter is high enough and the temperature is higher than the self-ignition temperature, hydrothermal flame is formed, and the supercritical hydrothermal combustion SCWO process has obvious advantages compared with the traditional SCWO process. The adoption of hydrothermal flame can realize the complete degradation of organic matters within a reaction time of several milliseconds, thereby reducing the volume of the combustion device. When the SCWO process of hydrothermal flame is operated by selecting a positive displacement combustion device, the reaction of the imported materials can still be carried out under the condition of room temperature, thereby avoiding the problems of blockage and corrosion in the preheating stage. But to the high organic waste water that contains salt, the inside corruption and the salt deposit jam phenomenon still can take place of burner, and specific appearance is:

(1) and the corrosion of materials. In a supercritical water environment, the corrosion rate of the corrosion-resistant material is accelerated by high temperature, high pressure, dissolved oxygen and some free radicals and ions generated in the reaction.

(2) The problem of salt deposition. Water is an excellent solvent for most of salts at normal temperature, and has high solubility. On the contrary, most of salts have extremely low solubility in the supercritical water with low density, thereby leading to a large amount of precipitation and causing the blockage of inlet and outlet pipelines of the combustion device, which not only influences the normal operation of the combustion device, but also brings potential equipment hidden troubles.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a supercritical hydrothermal combustion device for harmless treatment of high-salinity organic waste, which utilizes auxiliary fuel to supplement reaction heat and completes efficient and rapid degradation of refractory organic matters through active free radicals generated by the auxiliary fuel. The online separation of the reaction effluent and the inorganic salt is realized by arranging the porous wall in the combustion device, the inorganic salt is prevented from being deposited on the wall surface of the combustion device by the scraper structure, and the decompression conveying and energy recovery of the inorganic salt can be realized by the spiral conveying structure. In addition, the combustion device also has the characteristics of convenience in disassembly and assembly, easiness in loading and replacing the catalyst, easiness in overhauling and maintaining and the like.

In order to achieve the purpose, the invention adopts the technical scheme that:

a supercritical water heat combustion device for harmless treatment of high-salt organic waste comprises a split pressure-bearing wall provided with an end cover, wherein the split pressure-bearing wall is divided into an upper part, a middle part and a lower part, all the parts are connected through a connecting structure and fastening bolts, an oxygen cylinder and an auxiliary fuel cylinder are arranged in the upper part, an auxiliary fuel channel is formed between the outer wall of the auxiliary fuel cylinder and the inner wall of the oxygen cylinder, an oxygen channel is formed between the outer wall of the oxygen cylinder and the inner wall of the upper part of the split pressure-bearing wall, a high-temperature combustion chamber is arranged below the end cover and is positioned at the top end of the upper part of the split pressure-bearing wall, a nozzle base with a step-shaped longitudinal section is coaxially arranged at the bottom of the end cover, the bottom end of the nozzle base is positioned in the high-temperature combustion chamber, an auxiliary fuel annular space and an oxygen annular space are formed between the end cover and, the oxygen injection port is communicated with the oxygen annular space, the auxiliary fuel inner channel is communicated with the auxiliary fuel channel and the auxiliary fuel annular space, the oxygen inner channel is communicated with the oxygen channel and the oxygen annular space, a material channel is formed between the outer wall of the high-temperature combustion chamber and the auxiliary fuel cylinder, the material injection port is communicated with the material channel, and the auxiliary fuel annular space and the oxygen annular space are respectively communicated with the high-temperature combustion chamber through diffusion pore channels.

The axis central authorities of end cover are provided with the auxiliary fuel barrel, and the top of nozzle base station upwards stretches out the end cover from the auxiliary fuel barrel, and is the axial hole structure that link up in the central authorities of nozzle base station install the glass window structure that is used for observing the inside flame condition of burner in the axial hole, and the outer wall top of nozzle base station passes through seal structure with the auxiliary fuel barrel to be connected, forms the auxiliary fuel passageway with the auxiliary fuel annular space intercommunication between the inner wall of nozzle base station outer wall and auxiliary fuel barrel, and it has the auxiliary fuel filling opening with the auxiliary fuel passageway intercommunication to open on the auxiliary fuel barrel lateral wall.

The upper middle part of the split pressure-bearing wall is internally provided with an evaporation wall, the evaporation wall at the upper part is positioned in the auxiliary fuel cylinder and loads different wall catalytic materials, a cooling water double-spiral channel is formed between the evaporation wall at the upper part and the auxiliary fuel cylinder and between the evaporation wall at the lower part and the split pressure-bearing wall, and the two cooling water double-spiral channels are communicated up and down.

And a plurality of rows of micropores are arranged at the bottom of the cooling water double-helix channel, and cooling water which completes heat exchange with the interior of the combustion device enters the interior of the combustion device through the micropores.

The inner wall of the upper part of the evaporation wall is made of heat-resistant materials, the outer wall of the high-temperature combustion chamber is of a spiral structure, a spiral material channel is formed by matching the outer wall of the high-temperature combustion chamber with the heat-resistant materials, and the materials enter the combustion device below the high-temperature combustion chamber through the channel.

The material channel is communicated with the oxygen inner channel.

The end cover is connected with the upper part of the split pressure bearing wall through a fastening bolt, and a sealing block is arranged between the end cover and the upper part of the split pressure bearing wall; the upper part and the middle part of the split pressure-bearing wall are connected with each other through a connecting structure I and a fastening bolt; the middle part and the lower part of the split pressure-bearing wall are connected with each other through a connecting structure II and a fastening bolt; the connecting structure I is respectively matched with the upper middle parts of the oxygen cylinder, the auxiliary fuel cylinder, the evaporation wall and the split pressure-bearing wall; the connecting structure II is connected with a water-cooled wall on the outer side and a porous wall on the inner side, an annular cooling water channel communicated with a cooling water double-spiral channel is formed between the water-cooled wall and the split pressure-bearing wall, the annular cooling water channel is provided with a cooling water injection port, a reaction water outlet annular channel communicated with a reaction water outlet is formed between the water-cooled wall and the porous wall, and the porous wall is provided with a plurality of filtering holes for filtering out water discharged from the fluid after reaction.

The connecting structure I is provided with a cooling water channel, an auxiliary fuel secondary injection port, an oxygen secondary injection port, an auxiliary fuel upflow channel and an oxygen upflow channel, the two cooling water double-spiral channels are communicated up and down through the cooling water channel, the auxiliary fuel secondary injection port and the oxygen secondary injection port are both communicated with the interior of the combustion device, the auxiliary fuel upflow channel is communicated with the auxiliary fuel channel, and the oxygen upflow channel is communicated with the oxygen channel.

The auxiliary fuel channel is a spiral channel, and the oxygen channel is a spiral channel.

The inside scraper blade and the screw conveyor structure of being provided with of burner lower part components of a whole that can function independently pressure-bearing wall, and it constitutes the desalination district jointly and gets rid of this regional inorganic salt and export under the high pressure condition, and burner desalination district bottom is provided with the salt thick liquid discharge port.

Compared with the prior art, the invention has the beneficial effects that:

compared with the existing supercritical water oxidation combustion device, the invention has the advantages that:

1. the SCWO process of supercritical hydrothermal combustion is carried out when the combustion device treats high-salinity organic waste, and by means of the cooperation of strengthening measures such as segmented oxygen injection and auxiliary fuel injection, complete degradation of organic matters under the residence time of milliseconds can be realized at the reaction temperature of 600-1100 ℃, and further the volume of the combustion device is reduced.

2. The combustion device is innovatively provided with a porous wall, and the effective separation of reaction effluent and inorganic salt precipitated under a supercritical condition is realized through the filtering holes on the porous wall. The reaction effluent with low salt content can enter a subsequent energy recovery device to recover heat and pressure energy, and the salt slurry with low water content discharged through the spiral structure can greatly simplify the subsequent inorganic salt recovery process.

3. The method aims at the problems that the energy demand of the current supercritical water oxidation reaction device is large and the system economy is not high. The high-temperature combustion chamber is arranged in the combustion device, and a large amount of heat is released through the reaction of clean auxiliary fuel and oxygen and is further mixed with materials. The waste material forms rotational flow when entering the combustion device through the spiral structure, so that heat transfer between high-temperature fluid after reaction and low-temperature feeding is realized, low-temperature incidence of the waste material can be realized, energy consumption is greatly reduced, and the problems of corrosion and salt deposition of the waste material in the preheater are fundamentally solved.

4. The device innovatively combines the water cooling wall and the evaporation wall. The cooling water entering from the bottom completes the heat exchange with the reaction outlet water in the cooling water channel between the water-cooled wall and the pressure-bearing wall, then flows upwards to enter the double-helix structure of the evaporation wall, and permeates into the combustion device through the evaporation wall, and a layer of subcritical/supercritical protection water film is formed on the surface of the inner wall. The water film not only can cool the inner wall surface of the combustion chamber, but also can prevent the high-temperature reaction fluid from directly contacting with the wall surface, and reduce the corrosion of the reaction fluid to the wall surface and the precipitation of inorganic salt on the wall surface.

Drawings

FIG. 1 is a sectional view showing the structure of a combustion apparatus according to the present invention;

wherein: 1. fastening a bolt; 2. a sealing block; 3. a heat-resistant material; 4. an oxygen cylinder; 5. a first auxiliary fuel cartridge; 6. an evaporation wall cylinder; 7. a split pressure-bearing wall; 8. a connecting structure I; 9. a water cooled wall; 10. a porous wall; 11. a squeegee; 12. a connecting structure II; 13. a screw conveying structure; 14. an end cap; 15. a nozzle base; 16. a second auxiliary fuel cartridge; 17. a sealing structure; 18. a high temperature combustion chamber; 19. a glass window structure; 20. micropores; 21. and (4) filtering holes.

A is an auxiliary fuel annular space; b is an oxygen annular space; c is an auxiliary fuel inner channel; d is an oxygen inner channel; e is a pore channel; f is a cooling water channel; g is an auxiliary fuel up-flow channel; h is an oxygen up-flow channel; i is a cooling water double-helix channel; j is an auxiliary fuel spiral channel; k is an oxygen spiral channel; l is an annular cooling water channel; m is a reaction water outlet annular channel.

N1 is an auxiliary fuel injection port; n2 is an oxygen injection port; n3 is a material injection port; n4 is an auxiliary fuel secondary injection port; n5 is oxygen secondary injection port; n6 is a cooling water injection port; n7 is a reaction water outlet; n8 is the salt slurry discharge outlet.

Fig. 2 is a partial (upper-upper part of fig. 1) schematic view of the present invention.

Fig. 3 is a partial (lower middle part of fig. 1) schematic view of the present invention.

Fig. 4 is a schematic view of a nozzle base.

FIG. 5 is a schematic view of the structure of the connecting structure I.

FIG. 6 is a top view of connecting structure I.

FIG. 7 is a schematic view of the structure of the connection structure II.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 2 and 3, the supercritical water-heat combustion device for harmless treatment of high-salinity organic waste comprises a split pressure-bearing wall 7 provided with an end cover 14, wherein the split pressure-bearing wall 7 is divided into an upper part, a middle part and a lower part, the end cover 14 is connected with the upper part of the split pressure-bearing wall 7 through a fastening bolt 1, and a sealing block 2 is arranged between the end cover 14 and the upper part of the split pressure-bearing wall 7; the upper part and the middle part of the split pressure-bearing wall 7 are connected with the fastening bolt 1 through a connecting structure I8; the middle part and the lower part of the split pressure-bearing wall 7 are connected with the fastening bolt 1 through a connecting structure II 12.

An oxygen cylinder 4 and a first auxiliary fuel cylinder 5 are arranged in the upper portion of the split pressure-bearing wall 7, an auxiliary fuel channel J is formed between the outer wall of the first auxiliary fuel cylinder 5 and the inner wall of the oxygen cylinder 4, an oxygen channel K is formed between the outer wall of the oxygen cylinder 4 and the inner wall of the upper portion of the split pressure-bearing wall 7, a high-temperature combustion chamber 18 is assembled below the end cover 14, the high-temperature combustion chamber 18 is located at the top end of the upper portion of the split pressure-bearing wall 7, and the outer wall surface of the high-temperature combustion. The top of the end cover 14 is provided with an oxygen injection port N2 and a material injection port N3, and the inside of the end cover 14 is provided with an auxiliary fuel inner channel C and an oxygen inner channel D.

Referring to fig. 1, 2, 3 and 4, a nozzle base 15 is coaxially arranged on the end cover 14 in the radial direction, the longitudinal section of the nozzle base 15 is in a step shape, the bottom end of the nozzle base 15 is positioned in a high-temperature combustion chamber 18, and an auxiliary fuel annular space a and an oxygen annular space B are formed between the end cover 14 and the nozzle base 15 in a matched mode. The fuel-assist annulus a is located above for injection of the auxiliary fuel and the oxygen annulus B is located below for injection of oxygen. Wherein, oxygen filling opening N2 intercommunication oxygen annular space B, passageway C intercommunication auxiliary fuel passageway J and auxiliary fuel annular space A in the auxiliary fuel, passageway D intercommunication oxygen passageway K and oxygen annular space B in the oxygen, form the material passageway between high temperature combustion chamber 18 outer wall and the first auxiliary fuel barrel 5, material filling opening N3 and material passageway intercommunication, auxiliary fuel annular space A and oxygen annular space B are respectively through diffusion pore E and high temperature combustion chamber 18 intercommunication for auxiliary fuel and oxygen spout and burn in high temperature combustion chamber 18.

In the present invention, both the auxiliary fuel passage J and the oxygen passage K may be spiral passages.

A second auxiliary fuel cylinder 16 may be disposed at the center of the axis of the end cap 14, the top of the nozzle base 15 extends upward from the second auxiliary fuel cylinder 16 to the end cap 14, the center of the nozzle base 15 has a through axial hole structure, a glass window structure 19 for observing the flame condition inside the combustion device is installed in the axial hole, the top of the outer wall of the nozzle base 15 is connected to the second auxiliary fuel cylinder 16 by a sealing structure 17, an auxiliary fuel passage J communicating with the auxiliary fuel annular space a is formed between the outer wall of the nozzle base 15 and the inner wall of the second auxiliary fuel cylinder 16, and an auxiliary fuel injection port N1 communicating with the auxiliary fuel passage J is opened on the side wall of the second auxiliary fuel cylinder 16. Oxygen is injected into the oxygen annular space B from the oxygen injection port N2 and the oxygen inner channel D, and auxiliary fuel is injected into the auxiliary fuel annular space A from the auxiliary fuel injection port N1 and the auxiliary fuel inner channel C.

An evaporation wall 6 can be arranged in the upper middle part of the split pressure-bearing wall 7, the evaporation wall 6 at the upper part is positioned in the first auxiliary fuel cylinder 5 and loads different wall surface catalytic materials, a cooling water double-spiral channel I is formed between the evaporation wall 6 at the upper part and the first auxiliary fuel cylinder 5 and between the evaporation wall 6 at the lower part and the split pressure-bearing wall 7, and the two cooling water double-spiral channels I are communicated up and down. The cooling water double spiral channel I bottom is equipped with multirow micropore 20, and the cooling water that accomplishes the heat exchange with the combustion apparatus inside gets into the combustion apparatus inside through micropore 20.

The upper inner wall of the evaporation wall 6 can be made of heat-resistant material 3, and the heat-resistant material 3 is matched with the inner wall of the double-helix water-cooling cylinder 6 of the evaporation wall and is used for preventing the material from being damaged by high-temperature fluid from the high-temperature combustion chamber 18. The outer wall of the high-temperature combustion chamber 18 is of a spiral structure, and is matched with the heat-resistant material 3 to form a spiral material channel, and the material enters the combustion device below the high-temperature combustion chamber 18 through the material channel. Further, the material passage may communicate with the oxygen inner passage D.

Referring to fig. 5 and 6, the connecting structure i 8 is respectively matched with the upper middle parts of the oxygen cylinder 4, the first auxiliary fuel cylinder 5, the evaporation wall 6 and the split pressure-bearing wall 7; the connecting structure I8 is provided with a cooling water channel F, an auxiliary fuel secondary injection port N4, an oxygen secondary injection port N5, an auxiliary fuel upper flow channel G and an oxygen upper flow channel H, and the two cooling water double spiral channels I are communicated up and down through the cooling water channel F. The auxiliary fuel secondary injection port N4 and the oxygen secondary injection port N5 are communicated with the interior of the combustion device, the auxiliary fuel upper flow passage G is communicated with an auxiliary fuel passage J, and the oxygen upper flow passage H is communicated with an oxygen passage K. The bottom of the cylinder body where the evaporation wall 6 is positioned is provided with a small hole.

The connection structure I8 on the left and right sides of the combustion device can inject oxygen and auxiliary fuel through an oxygen secondary injection port N5 and a fuel secondary injection port N4 respectively, in the connection structure I8, the oxygen and the auxiliary fuel are divided into three streams, one stream of the oxygen and the auxiliary fuel enters an oxygen cylinder 4 (an oxygen channel K) and a first auxiliary fuel cylinder 5 (an auxiliary fuel channel J) respectively, the other two streams of the oxygen and the auxiliary fuel enter the combustion device, and the secondary oxygen injection and the secondary auxiliary fuel inside the combustion device are achieved.

Referring to fig. 7, an outer water-cooled wall 9 and an inner porous wall 10 are connected to the connecting structure ii 12, an annular cooling water channel L communicating with the cooling water double spiral channel I is formed between the water-cooled wall 9 and the split pressure-bearing wall 7, the annular cooling water channel L is provided with a cooling water inlet N6, a reaction water outlet annular channel M communicating with a reaction water outlet N7 is formed between the water-cooled wall 9 and the porous wall 10, and the porous wall 10 is provided with a plurality of filtering holes 21 for filtering out water from a reaction fluid. The reaction effluent and the precipitated inorganic salts can be separated and discharged by means of the porous wall 10, and the water-cooled wall 9 can preheat the cooling water.

A scraper 11 and a spiral conveying structure 13 are arranged in the lower split pressure-bearing wall 7 of the combustion device to jointly form a salt removing area, salt deposited on the wall surface can be scraped and removed and transported under high pressure, and a salt slurry outlet N8 is arranged at the bottom end of the salt removing area.

According to the structure, when the reaction starts, the preheated auxiliary fuel and oxygen are injected through the auxiliary fuel injection port N1 and the oxygen injection port N2, and the preheated auxiliary fuel and oxygen respectively enter two annular spaces formed by the end cover 14 and the nozzle base platform 15, and then enter the high-temperature combustion chamber 18 through the annular channel to be mixed and combusted, so that a large amount of heat is released, and the combustion device is preheated.

Then the material is injected into the combustion device through the material injection port N3, the auxiliary fuel and the oxygen are injected into the combustion device through the auxiliary fuel secondary injection port N4 and the oxygen secondary injection port N5, and part of the auxiliary fuel and the oxygen are directly injected into the combustion device for strengthening the degradation of the waste organic waste. The other part is respectively conveyed upwards to the top of the combustion device through an oxygen channel and an auxiliary fuel channel formed by the oxygen cylinder 4 and the first auxiliary fuel cylinder 5, and enters the corresponding annular space through the pore channels on the top end cover 14, and then enters the high-temperature combustion chamber 18 for reaction. Meanwhile, cooling water is introduced into the cooling water injection port N6, and exchanges heat with reaction outlet water through the cooling water channel and further flows into the double-spiral channel, and a subcritical/supercritical water film is formed on the inner wall surface of the combustion device. Because the evaporation wall cylinder 6 is a double-spiral channel, when cooling water flows into the top of the combustion device through one channel, the cooling water flows downwards through the other channel communicated with the top. The evaporation wall cylinder 6 of the down-flow spiral channel at the bottom of the combustion device is provided with small holes, and cooling water in the down-flow spiral channel enters the interior of the combustion device.

The reaction product after the reaction is separated from the inorganic salt separated out in the reaction process after passing through the porous wall 10 at the bottom of the combustion device. The reaction effluent flows out through an annular channel outside the porous wall and a reaction effluent outlet N7, and after dehydration, inorganic salt deposited on the porous wall 10 is scraped off by a scraper 11 and is conveyed to a salt slurry outlet N8 by a spiral conveying structure 13.

In summary, the invention discloses a supercritical water-heat combustion device for harmless treatment of high-salt-content organic waste, wherein an end cover is arranged at the upper end of a split bearing wall, a coaxial nozzle base station is arranged at the center of the bottom of the end cover, and the end cover and the nozzle base station are ingeniously matched to form a plurality of reactant annular spaces. The inside high temperature combustion chamber that is provided with of burner, the oxygen and the auxiliary fuel that preheat take place the burning in the high temperature combustion chamber, and then ignite organic waste inside burner, realize the rapid heating up burning degradation of low temperature organic waste to effectively reduce the heat consumption of preheating the in-process and prevent the emergence of this in-process corruption and salt deposit. The combustion device is provided with a secondary oxygen and an auxiliary fuel injection port to strengthen the reaction process. The device is innovatively provided with a porous wall, a scraper and a spiral conveying structure, so that the reaction effluent and inorganic salt can be separated on line. In addition, the evaporation wall water is preheated through high-temperature outlet water, so that the energy consumption of the system is effectively reduced, and the influence of too low temperature of the evaporation wall water on the effective degradation of pollutants in the combustion device is prevented. The device can realize harmless and efficient treatment and online desalting and discharging of harmful organic matters such as high-concentration high-salt chemical wastewater, municipal sludge, industrial sludge and the like which are difficult to biochemically degrade.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A supercritical water heat combustion device for harmless treatment of high-salt organic waste comprises a split pressure-bearing wall (7) provided with an end cover (14), and is characterized in that the split pressure-bearing wall (7) is divided into an upper part, a middle part and a lower part, all the parts are connected through a connecting structure and fastening bolts, wherein an oxygen cylinder (4) and a first auxiliary fuel cylinder (5) are arranged in the upper part, an auxiliary fuel channel (J) is formed between the outer wall of the first auxiliary fuel cylinder (5) and the inner wall of the oxygen cylinder (4), an oxygen channel (K) is formed between the outer wall of the oxygen cylinder (4) and the inner wall of the upper part of the split pressure-bearing wall (7), a high-temperature combustion chamber (18) is assembled below the end cover (14), the high-temperature combustion chamber (18) is positioned at the top end of the upper part of the split pressure-bearing wall (7), a nozzle base (15) with a step-shaped longitudinal section is coaxially arranged at the bottom of the, an auxiliary fuel annular space (A) and an oxygen annular space (B) are formed between the end cover (14) and the nozzle base station (15) in a matching way, an oxygen injection port (N2) and a material injection port (N3) are arranged at the top of the end cover (14), an auxiliary fuel inner channel (C) and an oxygen inner channel (D) are arranged inside the end cover (14), wherein, oxygen filling opening (N2) intercommunication oxygen annular space (B), passageway (C) intercommunication auxiliary fuel passageway (J) and auxiliary fuel annular space (A) in the auxiliary fuel, passageway (D) intercommunication oxygen passageway (K) and oxygen annular space (B) in the oxygen, form the material passageway between high temperature combustion chamber (18) outer wall and first auxiliary fuel barrel (5), material filling opening (N3) and material passageway intercommunication, auxiliary fuel annular space (A) and oxygen annular space (B) communicate with high temperature combustion chamber (18) through diffusion pore (E) respectively.

2. The supercritical water thermal combustion apparatus for the harmless treatment of high-salinity organic waste according to claim 1, the fuel nozzle is characterized in that a second auxiliary fuel cylinder (16) is arranged in the center of the axis of the end cover (14), the top of the nozzle base platform (15) upwards extends out of the end cover (14) from the second auxiliary fuel cylinder (16), and the center of the nozzle base platform (15) is of a through axial hole structure, a glass window structure (19) for observing the flame condition in the combustion device is arranged in the axial hole, the top of the outer wall of the nozzle base station (15) is connected with the second auxiliary fuel cylinder (16) through a sealing structure (17), an auxiliary fuel channel (J) communicated with the auxiliary fuel annular space (A) is formed between the outer wall of the nozzle base (15) and the inner wall of the second auxiliary fuel cylinder (16), and an auxiliary fuel injection port (N1) communicated with the auxiliary fuel channel (J) is formed on the side wall of the second auxiliary fuel cylinder (16).

3. The supercritical water thermal combustion apparatus for the harmless treatment of organic wastes containing high salt according to claim 1, wherein an evaporation wall (6) is arranged in the upper middle part of the split pressure-bearing wall (7), the evaporation wall (6) at the upper part is positioned in the first auxiliary fuel cylinder (5) and carries different wall catalytic materials, a cooling water double-spiral channel (I) is formed between the evaporation wall (6) at the upper part and the first auxiliary fuel cylinder (5), and between the evaporation wall (6) at the lower part and the split pressure-bearing wall (7), and the two cooling water double-spiral channels (I) are communicated up and down.

4. The supercritical water thermal combustion apparatus for harmless treatment of organic waste with high salt content according to claim 3 is characterized in that the cooling water double spiral channel (I) is provided with a plurality of rows of micropores (20) at the bottom, and cooling water which completes heat exchange with the inside of the combustion apparatus enters the inside of the combustion apparatus through the micropores (20).

5. The supercritical water heating combustion apparatus for harmless treatment of high salinity organic waste according to claim 3, characterized in that the upper inner wall of the evaporation wall (6) is made of heat-resistant material (3), the outer wall of the high temperature combustion chamber (18) is of a spiral structure, and the outer wall of the high temperature combustion chamber is matched with the heat-resistant material (3) to form a spiral-shaped material passage, and the material enters the combustion apparatus below the high temperature combustion chamber (18) through the material passage.

6. The supercritical water thermal combustion plant for the harmless treatment of high salinity organic waste according to claim 1 or 5, characterized in that the material channel is communicated with an oxygen inner channel (D).

7. The supercritical water heating combustion apparatus for the harmless treatment of high salinity organic waste according to claim 3, characterized in that the end cover (14) is connected with the upper part of the split pressure bearing wall (7) through a fastening bolt (1) on the outside, and a sealing block (2) is arranged between the end cover (14) and the upper part of the split pressure bearing wall (7); the upper part and the middle part of the split pressure-bearing wall (7) are connected with the fastening bolt (1) through a connecting structure I (8) at the outside; the middle part and the lower part of the split pressure-bearing wall (7) are connected with the fastening bolt (1) through a connecting structure II (12) at the outside; wherein, the connecting structure I (8) is respectively matched with the upper middle parts of the oxygen cylinder (4), the first auxiliary fuel cylinder (5), the evaporation wall (6) and the split pressure-bearing wall (7); the water cooling wall (9) on the outer side and the porous wall (10) on the inner side are connected to the connecting structure II (12), an annular cooling water channel (L) communicated with the cooling water double-spiral channel (I) is formed between the water cooling wall (9) and the split pressure-bearing wall (7), the annular cooling water channel (L) is provided with a cooling water injection port (N6), a reaction water outlet annular channel (M) communicated with a reaction water outlet (N7) is formed between the water cooling wall (9) and the porous wall (10), and the porous wall (10) is provided with a plurality of filtering holes (21) used for filtering out water discharged from the fluid after reaction.

8. The supercritical water thermal combustion device for the harmless treatment of the organic waste with high salt content according to claim 7, wherein the connecting structure I (8) is provided with a cooling water channel (F), an auxiliary fuel secondary injection port (N4), an oxygen secondary injection port (N5), an auxiliary fuel upflow channel (G) and an oxygen upflow channel (H), the two cooling water double-spiral channels (I) are communicated up and down through the cooling water channel (F), the auxiliary fuel secondary injection port (N4) and the oxygen secondary injection port (N5) are both communicated with the interior of the combustion device, the auxiliary fuel upflow channel (G) is communicated with the auxiliary fuel channel (J), and the oxygen upflow channel (H) is communicated with the oxygen channel (K).

9. The supercritical water thermal combustion apparatus for the harmless treatment of high salinity organic waste according to claim 1 or 8, characterized in that the auxiliary fuel channel (J) is a spiral channel and the oxygen channel (K) is a spiral channel.

10. The supercritical water heating combustion apparatus for the harmless treatment of high salinity organic waste according to claim 8, characterized in that the lower part of the combustion apparatus is provided with a scraper (11) and a screw conveying structure (13) inside the pressure-bearing wall (7), which together form a desalination region and remove inorganic salts in the region and transport them under high pressure, and the bottom end of the desalination region of the combustion apparatus is provided with a salt slurry outlet (N8).